Whether it's sunup or during a late-night brainstorm, I love a hot cup of joe.
From the sltrib.com
As Muslims begin their fast at sunup each morning, bakers are already busy at work.
From the news-journalonline.com
Before sunup, transport planes and helicopters swept down and retrieved them.
From the newsweek.com
Graves is out before sunup to patrol the runway, scaring off loitering birds.
From the sacbee.com
This man is working 7 days a week from sunup to sundown and he's HAPPY for the work.
From the latimes.com
Papa wakes me before sunup the next morning and sends me out to milk Nettie.
From the inrich.com
The dark blue Lincolns cruise the Washington streets from sunup to midnight.
From the time.com
They fish each day from sunup to sundown, unless the wind is over 25 knots.
From the heraldtribune.com
We played against our friends from practically sunup to well past sundown.
From the ocregister.com
More examples
Dawn: the first light of day; "we got up before dawn"; "they talked until morning"
Sunrise is the instant at which the upper edge of the Sun appears above the horizon in the east. Sunrise should not be confused with dawn, which is the (variously defined) point at which the sky begins to lighten, some time before the sun itself appears, ending twilight. ...